1. Convert to base units
grams = input value x input unit factor
Every supported mass unit is stored as a factor relative to grams.
Common unit converter
Mass Unit Converter
Convert metric and imperial mass units for engineering, physics, materials, shipping, lab work, and everyday calculations.
Live mass conversion
Convert mass units
Enter a value, choose the starting unit, and select a target unit. The full mass conversion table updates automatically.
Converted value
All units
Mass conversion table
Compare the entered value across common metric, imperial, and engineering mass units.
Common conversions
Useful mass conversion factors
| Conversion | Factor | Typical use |
|---|---|---|
| Kilograms to pounds | lb = kg x 2.20462262 | Material weights, shipping, body mass |
| Pounds to kilograms | kg = lb x 0.45359237 | Metric-imperial mass conversion |
| Ounces to grams | g = oz x 28.349523125 | Small parts, lab quantities, recipes |
| Grams to kilograms | kg = g / 1000 | Engineering and science calculations |
| Metric tons to kilograms | kg = t x 1000 | Large loads and material quantities |
| Stones to kilograms | kg = st x 6.35029318 | UK body mass conversions |
How it works
Mass conversion method
2. Convert to target units
target value = base value / target unit factor
The selected result and table values are calculated from the same base value.
3. Check precision
rounding depends on scale
Very small and very large values use compact scientific notation to stay readable.
FAQ
Mass converter questions
How do you convert kilograms to pounds?
Multiply kilograms by 2.20462262 to convert kilograms to pounds.
How do you convert pounds to kilograms?
Multiply pounds by 0.45359237 to convert pounds to kilograms.
Is a metric ton the same as a US ton?
No. A metric ton is 1000 kg, while a US short ton is 2000 lb, or 907.18474 kg.
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